Authenticate Zendesk Application requests to outside API

Hi!

I'm building an application that will need to make requests to an external API (think AWS lambda). I was wondering if there's any way I can authenticate my requests without forcing the users to set-up any properties during the installation, be it a password or a secret_key for the JWT requests, and just provide a simple click to install app.

Any other thougths or ideas on how to secure my API requests in a seamless way for the user? Is there a way for me to generate a random password and forever associate it to the Zendesk Account and be able to reuse it across installations?